Water Pump User Manual

Doc No: OMM50000903
Rev: B Page 46 of 65
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10.4 Servicing the Power End
10.4.1 Replacing Piston Rod Oil Seals
NOTE: Insure that all pressure inside the pump fluid cylinder has been bled off before
starting any service work. CAUTION: CHECK TO INSURE THAT THE POWER IS
LOCKED OUT AND TAGGED OUT.
1. The piston rod oil seals (9) retain oil in the power end and prevent contamination
from entering the power end by way of the piston rods. The fluid end and
cylinders must be removed as outlined in the previous sections to provide access
to these seals.
2. For L09 through L16 models, rotate
the seal retainer (10) counter
clockwise until it is unscrewed from
the frame, then slide off of the rod. A
spanner wrench, FMC part number
P535087, is normally used to rotate
the seal retainer, but a screwdriver
and mallet will also work. For L06
models the seal holder (8) is press fit
into the power frame and the seals (9)
are press fit into the seal holder.
Thread tool number 5259112 (a 1 ¼
NPT coupling with an appropriate
length of pipe attached will also work)
onto the seal holder and move in an
oscillating motion to work the seal holder out.
3. For L09 through L16 models, pull the
seal holder (8) out of the pump frame
and slide off of the rod. It may be
necessary to insert a screwdriver or
pointed tool into one of the holes in
the seal holder on the L09 to help
extract it from the power frame. For
L11 through L16, it will require using
two screwdrivers to slide the seal
holder out of the recess. A slight
rocking motion on the seal holder may
aid in removal.
4. Remove the seal retainer gasket (11) from the power frame. Inspect the seals (9)
and note the orientation of the seals prior to removal. The seals may now be
removed from the seal holder and discarded.